.APP_develop {
  width: 1350px;
  background-color: #f5f5f5;
  margin: 0 auto;
}
.APP_develop .APP_develop_content .APP_develop_title b {
  font-size: 11px;
  color: #3f3f3f;
}
.APP_develop .APP_develop_content .APP_develop_title h1 {
  text-align: center;
  margin-top: 60px;
}
.APP_develop .APP_develop_content .APP_develop_title p {
  font-weight: 500;
  display: block;
  width: 788px;
  font-size: 14px;
  color: #999999;
  margin: 0 auto;
  text-align: center;
  margin-top: 5px;
}
.APP_develop .APP_develop_content .APP_develop_content_list {
  background-color: white;
  display: flex;
  margin-top: 12px;
  flex-direction: column;
}
.APP_develop .APP_develop_content .APP_develop_content_list img {
  flex: 1;
  margin-top: 15px;
}
.APP_develop .APP_develop_content .APP_develop_content_list img:first-child {
  margin: 0;
}
.APP_develop .APP_develop_content .APP_develop_content_list .APP_develop_listnav {
  padding: 0 0 100px 0;
}
.APP_develop .APP_develop_content .APP_develop_content_list .APP_develop_listnav ul {
  margin-top: 35px;
  width: 230px;
  margin: 0 auto;
}
.APP_develop .APP_develop_content .APP_develop_content_list .APP_develop_listnav ul li {
  cursor: pointer;
  border: 1px solid #999;
  margin-top: 30px;
  display: inline-block;
  width: 38px;
  height: 30px;
  line-height: 30px;
  font-size: 16px;
  text-align: center;
}
.APP_develop .APP_develop_content .APP_develop_content_list .APP_develop_listnav ul li:first-child {
  border: none;
}
